original image is
I would like to compare the rectangular objects present in this image with a rectangular mask?how can i select a rectangular mask? How to compare the similarity of rectangular like image and a mask. I would like to check the similarity using
from the paper
A Fractional Fourier Transform Based Method of Image Fusion. For this, I wrote a sliding window template. How to implement this equation :
I = imread('test1.png');
imageWidth = size(I, 2);
imageHeight = size(I, 1);
windowWidth = 32;
windowHeight = 32;
for j = 1:imageHeight - windowHeight + 1
for i = 1:imageWidth - windowWidth + 1
window = I(j:j + windowHeight - 1, i:i + windowWidth - 1, :);
Having extracted your window if I understand your similarity function correctly then
For efficiency it would probably be better to use nlfilter to perform a sliding window operation on your image.
First you need to create a function to calculate the similarity. The simplest way is to do this as an anonymous function of the form:
[email protected](M) 'Implent your similarity function here..';
As mask doesn't change when you silde your window you should be able to just call it directly and not need it as a variable of your function.
nlfilter(img, [m n], similarity); where [m n] gives the size of the window you want to use.